diff --git a/model/ndn-app-link-service.cpp b/model/ndn-app-link-service.cpp
index 6b89b42..2dbce52 100644
--- a/model/ndn-app-link-service.cpp
+++ b/model/ndn-app-link-service.cpp
@@ -70,7 +70,7 @@
   NS_LOG_FUNCTION(this << &nack);
 
   // to decouple callbacks
-  // Simulator::ScheduleNow(&App::OnNack, m_app, nack.shared_from_this());
+  Simulator::ScheduleNow(&App::OnNack, m_app, make_shared<lp::Nack>(nack));
 }
 
 //